LTC1067CGN#TRPBF

Overview

The LTC1067CGN#TRPBF is a dual, rail-to-rail, very low noise universal switched-capacitor building block housed in a 16-lead plastic SSOP package. It contains two identical second-order filter sections tunable via an external clock frequency with a nominal 100:1 clock-to-center frequency ratio. The device operates from a single 3V to –5V supply, drawing approximately 4.5mA at 250kHz. It supports multiple operating modes (Mode 1, 1b, 2, 3) to realize bandpass, highpass, lowpass, notch, and allpass functions using three to five external resistors per section.

Feature Summary

• Dual second-order switched-capacitor architecture providing independent filter sections within a single package
• Rail-to-rail input and output operation enabling compatibility with low voltage single-supply systems
• Programmable center frequency determined by external clock source with customizable ratios via operating modes
• Low noise performance exceeding 80dB dynamic range on a single 3.3V supply

Applications

• Notch filters for interference rejection
• Narrowband bandpass filters for signal selection
• Tone detection circuits
• Noise reduction systems

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging when sourcing components. Confirm that the CGN designation corresponds to the commercial temperature range of 0°C to 70°C and the 16-lead SSOP physical footprint required for the target printed circuit board layout.

Selection Notes

Select this component for designs requiring precise analog filtering without external inductors. Ensure the application can provide a clean square-wave clock signal, as performance depends heavily on clock quality. Consider the LTC1067-50 variant if lower power consumption is critical, noting its different 50:1 internal clock ratio.

Part Context

This part belongs to the LTC1067 family of universal switched-capacitor filters manufactured by Analog Devices Inc. It serves as a building block for constructing higher-order active filters. The device integrates precision switched-capacitor integrators and summing amplifiers to replace traditional RC networks in complex filter topologies.

Replacement Considerations

The LTC1067-50CGN#TRPBF is a related low-power variant with a 50:1 clock ratio. Direct substitution requires adjusting external resistor values to maintain the desired center frequency due to the differing internal scaling factors.